$(document).ready(function() {
    $('.mediumBoxGrid').hover(function() {
        $(".mediumBoxCaption", this).stop().animate({ top: '67px' }, { queue: false, duration: 160 });
    }, function() {
        $(".mediumBoxCaption", this).stop().animate({ top: '134px' }, { queue: false, duration: 160 });
    });
});